Finding the Fourth Proportional to 12,745.47, 19,117.71 and 3,385.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,745.47 : 19,117.71 = 3,385.56 : x
2. Step 2: Convert to fraction form
   12,745.47/19,117.71 = 3,385.56/x
3. Step 3: Cross multiply
   12,745.47x = 19,117.71 × 3,385.56
4. Step 4: Simplify right side
   12,745.47x = 64,724,154.27
5. Step 5: Solve for x
   x = 64,724,154.27/12,745.47
6. Step 6: Final answer
   x = 5,078.21